You could try to teach her to speak. Have someone knock on the door, get all excited and ask her to speak, over and over and treat. I taught Dexter to speak with hand signals and now he comes up to the kitchen window, we open it and ask him to speak and he gets treats through the "drive-through." It's a fun trick and makes a cute video because when you ask him if he wants fries with that, he's the only one who can see the hand signal, so it looks as if he's answering. I wish mine wouldn't bark so much when someone knocks.